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target-s390: Fail on unknown instructions

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We were being a bit too nice and didn't give the guest an invalid instruction
interrupt.

While that works, it's not exactly the fastest thing to do, since now the
guest doesn't know that we're not really implementing that instruction, so it
continues doing it.

We run into this with the set_page_unstable hint instruction. So let's bail out
in these cases.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Alexander Graf 2009-12-17 13:56:47 +01:00 committed by Aurelien Jarno
parent 3a03bfa5a2
commit d7963c43b9
1 changed files with 1 additions and 1 deletions
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target-s390x/kvm.c
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@ -405,7 +405,7 @@ static int handle_instruction(CPUState *env, struct kvm_run *run)
unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00);
uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff;
int ipb_code = (run->s390_sieic.ipb & 0x0fff0000) >> 16;
int r = 0;
int r = -1;
dprintf("handle_instruction 0x%x 0x%x\n", run->s390_sieic.ipa, run->s390_sieic.ipb);
switch (ipa0) {